#include<iostream>
#include<string>
using namespace std;

int main()
{
	string s = "Hello!";
	string t;
	cout << "Before:" << s << endl;
	for (size_t i = 0;i<s.length();i++)
	{
		t+= 'x';
	}
	cout << "After:" << t << endl;

	return 0;
}
